Updated the resource pack to version 1.21.4

• This means that it is no longer and will no longer be compatible with prior versions!

Changes:

• Pillagers can now drop arrows (at the same rate as skeletons)

Bug Fixes:

• Fixed a bug where the ender dragon would spawn in a glitched state upon the first end enter
• The "lil' guy" advancement is now also given upon obtaining the tophat lil' guy